摘要
松嫩平原沙地分布于松嫩平原的中西部半干旱气候区,是松嫩平原生态环境变化的敏感地区。利用上世纪80年代中期和2001年前后的遥感影像资料,采用RS和GIS集成技术,结合野外调查,研究了松嫩平原土地沙化现状及其动态变化。结果表明:近20年来,松嫩平原土地沙化有进一步发展的趋势,2001年的沙化土地面积比80年代中期增加了861.1km2,平均每年以0.44%的速度扩展。其中,重度沙地变化最大,中度沙地面积增加最多。在分析土地沙化发展影响因素的基础上,提出了防治对策。
Sandy land of Songnen Plain is distributed in the central and western semi - arid climatic zones of Songnen Plain, which is a sensitive area of the changing Songnen Plain ecological environment. Using the remote sensing image data of the mid - 1980s and before and after 2001, adopting the RS and GIS integration technology, combined with the field investigation, the actuality and dynamic changes of land desertification in the Songnen Plain were studied. The results showed that the land desertification in the Songnen Plain had the further development trend in the last 20 years, the desertification area in 2001 increased by 861. 1 km^2 compared with the mid - 1980s; the average expansion rate was 0.44% peryear. Thereinto, the severe sandy land changed the greatest, the moderate sand land area increased the most. The prevention and cure countermeasures were put forward on the basis of analyse the affecting factors of the development of land desertification.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第3期107-113,共7页
Journal of Arid Land Resources and Environment
基金
中国地质调查局"松嫩平原地下水资源及其环境问题调查评价"项目(编号1212010430352)资助
关键词
松嫩平原
土地沙化
动态变化
防治对策
Songnen Plain
sandy land
dynamic change
control countermeasure
